UFO: Underwater Flying Objects

Sailors, fishermen, dockworkers, police officers, coastal residents and others have reported eerie otherworldly ships emerging from and submerging into local waters.

Well, duh.

Didn't you see The Abyss?

But the article does mention The Battle Of Los Angeles, which is a cool story that you didn't learn in history class.

That's a real picture. Spotlights and antiaircraft firing at something over Los Angeles in February, 1942.

The California State Military Museum will tell you all about it.